Drop using `setup_requires`. (#98)

* Drop using ``setup_requires`` due to constant problems on GHA.

* Add preliminary support for Python 3.12a7

7 files changed, 71 insertions, 40 deletions

diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index ff3565d..0a41e5c 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -102,7 +102,7 @@ jobs:
           - "3.9"
           - "3.10"
           - "3.11"
-          - "3.12.0-alpha.5"
+          - "3.12.0-alpha.7"
         os: [ubuntu-20.04, macos-11]
         exclude:
           - os: macos-11
@@ -179,15 +179,15 @@ jobs:
           python setup.py build_ext -i
           python setup.py bdist_wheel
 
-      - name: Install zope.security and dependencies (3.12.0-alpha.5)
-        if: matrix.python-version == '3.12.0-alpha.5'
+      - name: Install zope.security and dependencies (3.12.0-alpha.7)
+        if: matrix.python-version == '3.12.0-alpha.7'
         run: |
           # Install to collect dependencies into the (pip) cache.
           # Use "--pre" here because dependencies with support for this future
           # Python release may only be available as pre-releases
           pip install --pre .[test]
       - name: Install zope.security and dependencies
-        if: matrix.python-version != '3.12.0-alpha.5'
+        if: matrix.python-version != '3.12.0-alpha.7'
         run: |
           # Install to collect dependencies into the (pip) cache.
           pip install .[test]
@@ -231,7 +231,7 @@ jobs:
           && startsWith(github.ref, 'refs/tags')
           && startsWith(runner.os, 'Mac')
           && !startsWith(matrix.python-version, 'pypy')
-          && !startsWith(matrix.python-version, '3.12.0-alpha.5')
+          && !startsWith(matrix.python-version, '3.12.0-alpha.7')
         env:
           TWINE_PASSWORD: ${{ secrets.TWINE_PASSWORD }}
         run: |
@@ -250,7 +250,7 @@ jobs:
           - "3.9"
           - "3.10"
           - "3.11"
-          - "3.12.0-alpha.5"
+          - "3.12.0-alpha.7"
         os: [ubuntu-20.04, macos-11]
         exclude:
           - os: macos-11
@@ -287,8 +287,8 @@ jobs:
         with:
           name: zope.security-${{ runner.os }}-${{ matrix.python-version }}.whl
           path: dist/
-      - name: Install zope.security 3.12.0-alpha.5
-        if: ${{ startsWith(matrix.python-version, '3.12.0-alpha.5') }}
+      - name: Install zope.security 3.12.0-alpha.7
+        if: ${{ startsWith(matrix.python-version, '3.12.0-alpha.7') }}
         run: |
           pip install -U wheel setuptools
           # coverage has a wheel on PyPI for a future python version which is
@@ -302,7 +302,7 @@ jobs:
           # Python release may only be available as pre-releases
           pip install --pre -U -e .[test]
       - name: Install zope.security
-        if: ${{ !startsWith(matrix.python-version, '3.12.0-alpha.5') }}
+        if: ${{ !startsWith(matrix.python-version, '3.12.0-alpha.7') }}
         run: |
           pip install -U wheel setuptools
           pip install -U coverage
diff --git a/.meta.toml b/.meta.toml
index f70b396..0fdd1ec 100644
--- a/.meta.toml
+++ b/.meta.toml
@@ -2,7 +2,7 @@
 # https://github.com/zopefoundation/meta/tree/master/config/c-code
 [meta]
 template = "c-code"
-commit-id = "f0962ac8"
+commit-id = "fe63cb4c"
 
 [python]
 with-appveyor = true
@@ -30,6 +30,7 @@ fail-under = 99.5
 additional-rules = [
     "include *.sh",
     "recursive-include docs *.bat",
+    "recursive-include include *.h",
     "recursive-include src *.zcml",
     ]
 
diff --git a/CHANGES.rst b/CHANGES.rst
index 21a78f3..71f21f0 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -9,7 +9,9 @@
   PEP 3114), and drop support for the Python 2 ``next`` method name from
   pure-Python proxies.
 
-- Add preliminary support for Python 3.12 as of 3.12a5.
+- Add preliminary support for Python 3.12 as of 3.12a7.
+
+- Drop using ``setup_requires`` due to constant problems on GHA.
 
 
 6.1 (2023-01-18)
diff --git a/MANIFEST.in b/MANIFEST.in
index 72637ed..14a3041 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -16,4 +16,5 @@ recursive-include docs Makefile
 recursive-include src *.py
 include *.sh
 recursive-include docs *.bat
+recursive-include include *.h
 recursive-include src *.zcml
diff --git a/include/zope.proxy/zope/proxy/proxy.h b/include/zope.proxy/zope/proxy/proxy.h
new file mode 100644
index 0000000..10e5b5b
--- /dev/null
+++ b/include/zope.proxy/zope/proxy/proxy.h
@@ -0,0 +1,53 @@
+#ifndef _proxy_H_
+#define _proxy_H_ 1
+
+typedef struct {
+    PyObject_HEAD
+    PyObject *proxy_object;
+} ProxyObject;
+
+#define Proxy_GET_OBJECT(ob)   (((ProxyObject *)(ob))->proxy_object)
+
+typedef struct {
+    PyTypeObject *proxytype;
+    int (*check)(PyObject *obj);
+    PyObject *(*create)(PyObject *obj);
+    PyObject *(*getobject)(PyObject *proxy);
+} ProxyInterface;
+
+#ifndef PROXY_MODULE
+
+/* These are only defined in the public interface, and are not
+ * available within the module implementation.  There we use the
+ * classic Python/C API only.
+ */
+
+static ProxyInterface *_proxy_api = NULL;
+
+static int
+Proxy_Import(void)
+{
+    if (_proxy_api == NULL) {
+        PyObject *m = PyImport_ImportModule("zope.proxy");
+        if (m != NULL) {
+            PyObject *tmp = PyObject_GetAttrString(m, "_CAPI");
+            if (tmp != NULL) {
+                if (PyCapsule_CheckExact(tmp))
+                    _proxy_api = (ProxyInterface *)
+                        PyCapsule_GetPointer(tmp, NULL);
+                Py_DECREF(tmp);
+            }
+        }
+    }
+    return (_proxy_api == NULL) ? -1 : 0;
+}
+
+#define ProxyType               (*_proxy_api->proxytype)
+#define Proxy_Check(obj)        (_proxy_api->check((obj)))
+#define Proxy_CheckExact(obj)   ((obj)->ob_type == ProxyType)
+#define Proxy_New(obj)          (_proxy_api->create((obj)))
+#define Proxy_GetObject(proxy)  (_proxy_api->getobject((proxy)))
+
+#endif /* PROXY_MODULE */
+
+#endif /* _proxy_H_ */
diff --git a/setup.cfg b/setup.cfg
index 6a8093d..114487d 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -24,7 +24,7 @@ ignore =
 force_single_line = True
 combine_as_imports = True
 sections = FUTURE,STDLIB,THIRDPARTY,ZOPE,FIRSTPARTY,LOCALFOLDER
-known_third_party = six, docutils, pkg_resources, pytz
+known_third_party = docutils, pkg_resources, pytz
 known_zope =
 known_first_party =
 default_section = ZOPE
diff --git a/setup.py b/setup.py
index d90c80f..aa0df8a 100644
--- a/setup.py
+++ b/setup.py
@@ -65,35 +65,12 @@ def read(*rnames):
     with open(os.path.join(os.path.dirname(__file__), *rnames)) as f:
         return f.read()
 
-# Include directories for C extensions
-# Sniff the location of the headers in the package distribution
-
-
-class ModuleHeaderDir:
-
-    def __init__(self, require_spec, where='../..'):
-        # By default, assume top-level pkg has the same name as the dist.
-        # Also assume that headers are located in the package dir, and
-        # are meant to be included as follows:
-        #    #include "module/header_name.h"
-        self._require_spec = require_spec
-        self._where = where
-
-    def __str__(self):
-        from pkg_resources import require
-        from pkg_resources import resource_filename
-        require(self._require_spec)
-        path = resource_filename(self._require_spec, self._where)
-        return os.path.abspath(path)
-
-
-include = [ModuleHeaderDir('zope.proxy')]
 
 codeoptimization = [
     Extension(
         "zope.security._proxy",
-        [os.path.join('src', 'zope', 'security', "_proxy.c")],
-        include_dirs=include,
+        include_dirs=[os.path.join('include', 'zope.proxy')],
+        sources=[os.path.join('src', 'zope', 'security', "_proxy.c")]
     ),
     Extension(
         "zope.security._zope_security_checker",
@@ -111,10 +88,8 @@ is_pypy = py_impl() == 'PyPy'
 is_jython = 'java' in sys.platform
 
 if is_pypy or is_jython:
-    setup_requires = []
     ext_modules = []
 else:
-    setup_requires = ['zope.proxy >= 4.3.0']
     ext_modules = codeoptimization
 
 
@@ -169,7 +144,6 @@ setup(name='zope.security',
       packages=find_packages('src'),
       package_dir={'': 'src'},
       namespace_packages=['zope'],
-      setup_requires=setup_requires,
       cmdclass={
           'build_ext': optional_build_ext,
       },